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METHOD OF CLEANING USEFUL MINERALS,IN PARTICULAR HARD COAL,IN HEAVY SUSPENSION-FORMING LIQUID AS WELL AS SINGLE-COMPARTMENT TWO-PRODUCT CONCENTRATOR AND SET OF SINGLE-COMPARTMENT THREE-PRODUCT CONCENTRATORS
METHOD OF CLEANING USEFUL MINERALS,IN PARTICULAR HARD COAL,IN HEAVY SUSPENSION-FORMING LIQUID AS WELL AS SINGLE-COMPARTMENT TWO-PRODUCT CONCENTRATOR AND SET OF SINGLE-COMPARTMENT THREE-PRODUCT CONCENTRATORS
